Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 807 · 40 questions

What you do (Dry out, crystals in): 1. An adult pours warm water into a cup. 2. Stir in salt, a spoon at a time, until no more dissolves. 3. Pour the salty water into a shallow dish and lay a string in it. 4. Leave it on a sunny windowsill, out of reach of small children, and check each day.

1. 1.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) cooking an egg (c) folding paper (d) rusting iron
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) yeast (d) a spoon
3. 3.True or false: chalk powder dissolves in water. (a) False (b) True
4. 4.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
5. 5.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
6. 6.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) warm water (c) salt (d) a shallow dish
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) False (b) True
9. 9.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
10. 10.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
11. 11.True or false: freezing water is a change that can be undone. (a) True (b) False
12. 12.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.🔍 Which is the odd one out? (a) food colour (b) chalk powder (c) sand (d) sawdust
14. 14.🧂 Which of these does not dissolve in water? (a) sugar (b) sawdust (c) baking soda (d) table salt
15. 15.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.🔍 Which is the odd one out? (a) baking soda (b) cooking oil (c) sugar (d) table salt
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the kind of salt (b) days to see crystals (c) sunny or shady place (d) the amount of salt
20. 20.True or false: dissolving salt is a change that can be undone. (a) True (b) False
21. 21.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
22. 22.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
23. 23.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny spheres (d) tiny cubes
24. 24.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) yeast (c) turmeric powder (d) salt
25. 25.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
26. 26.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
27. 27.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
28. 28.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
29. 29.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
30. 30.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a spoon (c) a balloon (d) a mirror
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) table salt (b) cooking oil (c) small pebbles (d) sand
34. 34.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) empty (c) saturated (d) frozen
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) True (b) False
36. 36.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
38. 38.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) crystals grow faster (d) few or no crystals
39. 39.🧂 Which of these does not dissolve in water? (a) table salt (b) sugar (c) food colour (d) cooking oil
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) True (b) False

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